Fix release workflow.

[benjaminrwilson]

PR Summary

Testing

In order to ensure this PR works as intended, it is:

• [ ] unit tested.
• [ ] other or not applicable (additional detail/rationale required)

Compliance with Standards

As the author, I certify that this PR conforms to the following standards:

• [ ] Code changes conform to PEP8 and docstrings conform to the Google Python style guide.
• [ ] A well-written summary explains what was done and why it was done.
• [ ] The PR is adequately tested and the testing details and links to external results are included.